Search results for: Janusz Zieliński
Open Mathematics > 2010 > 8 > 4 > 780-785
Central European Journal of Mathematics > 2010 > 8 > 4 > 780-785
Open Mathematics > 2010 > 8 > 4 > 780-785
Central European Journal of Mathematics > 2010 > 8 > 4 > 780-785